中波红外隐身目标光谱探测的谱带选择方法

针对采用各种隐身技术的红外目标与周围背景之间的辐射差异不明显，导致探测困难这一问题，利用目标和背景在窄波带内的辐射特征具有较大差异这一特性，建立了基于红外光谱探测的谱带内红外辐射对比度的研究。通过对红外辐射相对对比度以及绝对对比度的分析，综合大气条件在整个传输过程中的影响，结合理论计算以及实验分析确定出用于红外隐身目标探测的最优谱带为2.86～3.30m和4.17～4.55m两个窄波带。实验结果表明:在所选取的用于谱带探测的窄波带能够很好的消除背景红外辐射的影响，以此突出目标辐射，具有良好的可探测性。

Band selection method of spectrum detection about medium wave infrared stealth target

A study establishing the infrared radiation contrast in wave band of infrared spectrum detection, based on the great difference of radiation characteristics in the narrow wave band about target and background, was proposed to accurately detect the infrared stealth targets whose infrared radiation characteristics were similar with that of background. The optimum wave band, through analyzing the relative contrast and absolute contrast of target and background and considering the influence of atmospheric conditions in the whole transmission procession, was determined 2.86-3.30 m and 4.17-4.55 m. The results show that the narrow wave band which was selected by infrared contrast could eliminate radiation of background well, highlighting the target radiation and enhancing the detectability of target.